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threads: introduce util/threadnames, refactor thread naming

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This work is prerequisite to attaching thread names to log lines and deadlock
debug utilities. This code allows setting of an "internal" threadname per
thread on platforms where thread_local is available.

This commit also moves RenameThread() out of a more general module and adds a
numeric suffix to disambiguate between threads with the same name. It
explicitly names a few main threads using the new util::ThreadRename().
This commit is contained in:
James O'Beirne 2018-06-13 14:50:59 -04:00
parent 188ca75e5f
commit ae5f2b6a6c
12 changed files with 103 additions and 36 deletions
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11
src/httpserver.cpp
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@ -6,6 +6,7 @@
#include <chainparamsbase.h>
#include <compat.h>
#include <util/threadnames.h>
#include <util/system.h>
#include <util/strencodings.h>
#include <netbase.h>
@ -17,7 +18,7 @@
#include <memory>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <sys/types.h>
#include <sys/stat.h>
@ -284,7 +285,7 @@ static void http_reject_request_cb(struct evhttp_request* req, void*)
/** Event dispatcher thread */
static bool ThreadHTTP(struct event_base* base)
{
RenameThread("bitcoin-http");
util::ThreadRename("http");
LogPrint(BCLog::HTTP, "Entering http event loop\n");
event_base_dispatch(base);
// Event loop will be interrupted by InterruptHTTPServer()
@ -335,9 +336,9 @@ static bool HTTPBindAddresses(struct evhttp* http)
}
/** Simple wrapper to set thread name and run work queue */
static void HTTPWorkQueueRun(WorkQueue<HTTPClosure>* queue)
static void HTTPWorkQueueRun(WorkQueue<HTTPClosure>* queue, int worker_num)
{
RenameThread("bitcoin-httpworker");
util::ThreadRename(strprintf("httpworker.%i", worker_num));
queue->Run();
}
@ -430,7 +431,7 @@ void StartHTTPServer()
threadHTTP = std::thread(ThreadHTTP, eventBase);
for (int i = 0; i < rpcThreads; i++) {
g_thread_http_workers.emplace_back(HTTPWorkQueueRun, workQueue);
g_thread_http_workers.emplace_back(HTTPWorkQueueRun, workQueue, i);
}
}